To get a sip trunk registered on the server you need the following

configuration:

Go to trunks.

Click add a trunk

Click add a siptrunk

Trunk description   :  SipKom

Out bound caller id :   your 4932...  Number

CID options         :   Allow any CID options

Maxim um Channels   :  blank

Dial rules          :   X.

Outgoing settings   :

Trunk name:         :  sipkom

type=friend

username= "your user name"

secret="your secret"

nat=yes

insecure=port,invite

host=80.237.199.3

disallow=all

canreinvite=no

allow=g729